Railway-car truck



Nov. 27 1923 l G. G. FLOYD RALwAY CAR TRUCK Filed Feb. 12 1925 i @Sorge 01W/@gai @6MM y /WVM Patented Nov. 27, 1923.

U [TED S T A TES PATENT OFFICE..

GEORGE G. FLOYD, CHICAGO, ILLINOIS, ASSIGNOR TO AMERICAN STEEL FONDRIES,

OF CHICAGO, ILLINOIS, A CORPORATION OF NEW JERSEY.

RAILWAY-CAR TRUCK.

Application led February 12, 1923. Serial No. 618,682.

To ZLZZ 'whom t may concern:

Be it known that I, GEORGE G. FLOYD, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in a Railway-Car Truck, of which the following is a specification.

This invention relates to a railway car truck.

As is well known in the art, that portion of the tension member between the bolster columns'is subjected to bending stresses in addition to tension stresses. Consistent `with other features of design, the distance between the bolster columns, accordingly, should be reduced as much as possible. In cases in which it is desired to increase the spring capacity, with all springs being located between the bolster columns, some Special arrangement preferably' is used for maintaining thedistance between the bolster columns at a minimum.

One object of the invention is to provide a simple truck arra igement in which the spring capacity is increased, while at the same time the distance between the bolster columns and also the wheel base is minimized, the side frame made of maximum' strength and minimum weight and ample brake clearance is provided.

Another object is to provide asimple and eicient truck of high spring capacity adapted to meet the various requirements under service conditions. v

These and other objects are accomplished by means of the arrangement disclosed on the accompanying sheet of fdrawings, in which- Figure 1 is a fragmentary side elevation of a railway car truck, parts being in section, embodying my invention;

Figure 2 is a fragmentary top plan view` of the same arrangement; and

Figures 3 and 4, respectively, are sectional views taken in the planes of lines 3-3 and 4.-4 of Figure 1.

The various novel features of the invention will be apparent from the following de-l scription and drawings and will be articularly pointed out in the appended ciiiims.

Referring to the figures of the drawings, it will be noted that my invention is illustrated in connection with a railway car truck including a side frame 10 in which, in this particular instance, although not necessarily so, the tension member 11 compression member 12 and bolster columns 13 are all integrally formed. A spring plank 14 spans the distance between and rests upon the oppositely arranged side frames. As

shown the tension member between the bolsster columns 13` is of box section, the upper,l

wall of the section having laterally extending flanges 15 from which extend upwardly integraly formed dowel pins 16 which passinto corresponding openings 17in the ends of the spring plank 14. A plurality of these dowel pins 16 is shown connected to the spring plank at each end, but if desired a single dowel .pin may be centrally connected to each end of the springy plank for a loose type of truck.

As is well known, four springs associated with each side frame are usually employed for supporting the bolster and the load imposed thereon, all of said four springs being seated at each end of the. spring plank. 'In this particular instance, it is desired to employ more than four springs; six are shown. The four centrally arranged springs 18 are seated upon the spring plank, all on the same level. Each of the two end springs 19 is seated upon a separate seat 20 which not only is separate from the spring plank but also separate from the tension member 11, or any other part ofthe side frame. In, this instance, each spring seat 2() is provided with a dowel pin 21 which is received by a corresponding opening 22 in the tension member for definitely locating said spring seat. Aside from dowel pin 2l, the under side of the spring seat 20 is angled with respect to the to of the spring seat to conform with the ang e of the tension member at that point. The members 20 form spring seats which are elevated with respect to the spring seats -for the intermediate` springs, and each of said elevated spring seats is provided with a dowel 23 for center. ing the associated spring 19 mounted thereon. The upturned flanges 24 of the spring plank 14 restagainst the elevated spring seats 20 rand terminate at a point below the up er surface thereof.

e bolster, in this instance, has a relatively deep central portion 25 and relatively shallow side wing portions 26 whereby all of the Springs used may be of the same length and at the same time be accommodated by the holster having these stepped portions.

iro

In other words the relatively deep end portion 25 of the bolster rests upon the our ccntral springs and the relatively elevated wing portions 26 of the bolster rest upon the elevated end springs 19. The side walls 27 of the central portion 25 of the bolster are curved to accomodate and to limit the innermost-position of `the end springs 19 and the elevated spring seats 20 are provided with curved .,inner portions 28 to cooperate with the adjacent central springs 18 for assisting in positioning the latter. By means of this arrangement the objects of the invention are accomplished.

It is my intention to co'ver all modifications of the invention falling within the spirit and scope of the following claims.

I claim 1. In a railway car truck, the oombination of a side frame including tension and compression members and bolster columns, and bolster spring supporting seats, one of which is on a higher level than certain of the other seats and is separate from said other spring seats and separate from said tension member and mounted on the latter whereby an increased number of standard springs may be located between bolster columns spaced apart a given distance.

2. In a railway car truck, the combination of a side frame including tension and compression members and bolster columns, a spring plank supported by said tension member intermediate said bolster columns and forming a spring seat for intermediate springs, and other spring seats at a diierent level from said central spring seats and being separate from said spring plank and separate from said tension member and mounted on the latter whereby an increased number of standard springs may be located between bolster columns spaced apart a given distance.

3. In a railway car truck, the combination of a side frame including tension and compression members and bolster columns, and separately formed spring seats at diii'erent elevations each separate from said tension member and associated therewith whereby an increased number of standard springs may be located between bolster columns spaced apart a given distance.

4. In a railway car truck. the combination of a. side frame including tension and 'compression members and bolster columns, and a plurality of separate spring seats independently mounted upon said tension member between said bolster' columns wherebyv an increased number of standard springs may be located between bolster columns spaced apart a given distance.

5. In a railway car truck, the combination of a side frame including tension and compression members and bolster columns, a spring plank resting upon said tension member between said bolster columns for accommodating bolster supporting springs, and a separate spring seat having a dowel pin connection with said side frame.

6; In a railway car truck, the combination of a sidejframe including integrally formed tension and compression members and bolster columns, and bolster spring supporting seats, one of which is on a higher level than another and is separate from said tension member and mounted on the latter 'whereby an increased number of'standard be located between bolster a given distance. Illinois, this 9th day springs may columns spaced apart Signed at Chicago,

of February, 1923.

GEORGE G. FLOYD. 

